Q: What is the sum of all factors of the number 420,255 excluding 420,255?

 A: 397,665

Why is 397,665 the sum of all factors of 420,255, excluding 420,255?

The factors of the number 420,255 are: 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 283, 297, 495, 849, 1415, 1485, 2547, 3113, 4245, 7641, 9339, 12735, 15565, 28017, 38205, 46695, 84051, 140085, 420255.

If you add them up, you will get the total of 420,652. Now subtract 420,255 to get 397,665


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